DE333727C - Branch pipe connection - Google Patents

Description

GERMAN EMPIRE

ISSUED ON MARCH 3, 192t.

= REICHSPATENTAMT

PATENT LETTERING

CLASS 47f GROUP

fflannesmannröhren-Werke in Düsseldorf.

Branch pipe connection. Patented in the German Empire on May 2, 1918.

The invention relates to a branch pipe connection with an annular, under the The edge of the tapping opening gripping the fastening nipple and on the outer wall of the pipe seated, the sealing effecting saddle piece. From known branch pipe connections this type differs from the present one by the design of the Nipple and the hollow mandrel. Of the

ίο nipple consists of a short, perfect smooth piece of pipe, which is supported at the outer end against a shoulder of the saddle piece, while the inner end entering the main tube through the hollow expanding mandrel is flanged in such a way that it grips under the edge of the pipe. The flare of the Nipple is permanently supported, whereby the strength of the connection is ensured. from the known branch pipe connections with expandable nipples is different present connection further in that the flange of the nipple not only as before rests in two places on the pipe wall, but on the entire circumference. Due to the permanent support and the fixed installation is loosening and bending back of the Bördeis excluded. The hollow expanding mandrel can optionally also be tightened subsequently without fear of pulling out the nipple again.

In the drawing, such a branch pipe connection is in Fig. Ι in section and Partial view shown in the shape and form of the parts that these before attachment of the nipple.

FIGS. 2 and 3 show the finished connection in section and in elevation.

The fastening nipple consists of a short, smooth piece of pipe. This piece of pipe engages in the saddle piece c seated on the main pipe b and is supported against a shoulder c ^{1 of the} same. The saddle piece is sealed in a known manner on the pipe b at d. In the nipple α there is a hollow expanding mandrel e with an edge bead e ¹ . With this expanding mandrel e , an internally threaded pipe section f is connected, which is supported on the saddle piece c with the interposition of a seal g . After the hole has been drilled in the main pipe, for which purpose known tapping devices can be used, the branch pipe, as shown in FIG. 1, is inserted into the opening of the pipe b. Then the hollow expanding mandrel is pulled upward in the direction of the arrow in FIG. As a result, the lower edge of the nipple α is flanged outwards by the bead e ¹ of the expanding mandrel, so that it lies firmly against the pipe wall. This position and shape of the parts is shown in "FIGS. 2 and 3. As can be seen from these two figures, the flanged pipe nipple α is cut out corresponding to the radius of the pipe b , and the conical bead e ^{1 of} the hollow expanding mandrel e is of this type shaped so that the flange of the pipe a is brought to rest against the pipe wall over its entire circumference.

Claims (1)

Weitedornes also its rotation during the ι sealing effecting saddle piece, since tightening prevented. characterized in that the Be nipple serving to strengthen the branch Patent claim: ' ^a ^ ^s ώι smooth short pipe section (a) from is formed, on the one hand against a Branch pipe connection with ring shoulder (c ¹ ) of the saddle (c) supports shaped, under the edge of the tapping and on the other hand by a hollow bore Opening gripping fastening nipple wide-thorn (e) flanged and against the and sitting on the pipe wall, which: pipe wall is pressed. 1 sheet of drawings. BERLIN. PRINTED JN i) ER REICHSDRUCKEREI.